octogenarian

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octogenarian

(ŏk′tə-jə-nâr′ē-ən)
adj.
Being between 80 and 90 years of age.
n.
A person between 80 and 90 years of age.

octogenarian

(ŏk″tō-jĕn-ĕr′ē-ĕ-) [L. octogenarius, containing eighty]
A person who is 80 to 89 years old.